Pony trouble

Rainbow Dash then released several grunts causing Trixie to unlock her muzzle. "If you think that will work on me," Rainbow said "then you'll be disappointed. Because that will never work on me, nor what you put Rarity through." Upon hearing those words, Rarity sighed, hoping she doesn't have to share this torturous bench with her. Trixie, however, had other ideas. "Who says you going through the same thing?" Shen then cast another spell, this time Rainbow is locked in the same contraption as Twilight, except Trixie has a strange device around her underside and Rarity noticed that it was buckled. She then inserted the device into Rainbow Dash's rear end and Rainbow was screaming through her muzzle. Trixie was humming ignoring the screams. Once she was done, Trixie used her magic to remove her device and said to Rainbow, who was blushing 5 shades of red, "Had fun? Because I had, my minion." Then she used her magic to put Rarity back to a straitjacket and inserted an leash onto the three's collars. She then force the three ponies to walk on their hind legs and walked them into the back. She then said, "Now, since you three are trained and house broken, how about you three called me Mistress Trixie from now on. From now on, if you behave well, you will be able to be humiliated by whatever ways you can think of. If you don't well you will not be able to embarrass yourself. You will wear the bridles when you are in the house. If you cause bad behavior, I'll muzzle you. You are only allow to wear the straitjackets you are wearing and the collars." The three ponies nodded and Trixie remove the devices keeping them quiet. Rainbow then said "Mistress, can I move my wings now?"